1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17package com.android.tv.common.feature; 18 19import android.content.Context; 20import android.content.SharedPreferences; 21import android.util.Log; 22 23import com.android.tv.common.SharedPreferencesUtils; 24 25/** 26 * Feature controlled by shared preferences. 27 */ 28public final class SharedPreferencesFeature implements Feature { 29 private static final String TAG = "SharedPrefFeature"; 30 private static final boolean DEBUG = false; 31 32 private String mKey; 33 private boolean mEnabled; 34 private boolean mDefaultValue; 35 private SharedPreferences mSharedPreferences; 36 private final Feature mBaseFeature; 37 38 /** 39 * Create SharedPreferences controlled feature. 40 * 41 * @param key the SharedPreferences key. 42 * @param defaultValue the value to return if the property is undefined or empty. 43 * @param baseFeature if {@code baseFeature} is turned off, this feature is always disabled. 44 */ 45 public SharedPreferencesFeature(String key, boolean defaultValue, Feature baseFeature) { 46 mKey = key; 47 mDefaultValue = defaultValue; 48 mBaseFeature = baseFeature; 49 } 50 51 @Override 52 public boolean isEnabled(Context context) { 53 if (!mBaseFeature.isEnabled(context)) { 54 return false; 55 } 56 if (mSharedPreferences == null) { 57 mSharedPreferences = context.getSharedPreferences( 58 SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE); 59 mEnabled = mSharedPreferences.getBoolean(mKey, mDefaultValue); 60 } 61 if (DEBUG) Log.d(TAG, mKey + " is " + mEnabled); 62 return mEnabled; 63 } 64 65 @Override 66 public String toString() { 67 return "SharedPreferencesFeature:key=" + mKey + ",value=" + mEnabled; 68 } 69 70 public void setEnabled(Context context, boolean enable) { 71 if (DEBUG) Log.d(TAG, mKey + " is set to " + enable); 72 if (mSharedPreferences == null) { 73 mSharedPreferences = context.getSharedPreferences( 74 SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE); 75 mEnabled = enable; 76 mSharedPreferences.edit().putBoolean(mKey, enable).apply(); 77 } else if (mEnabled != enable) { 78 mEnabled = enable; 79 mSharedPreferences.edit().putBoolean(mKey, enable).apply(); 80 } 81 82 } 83} 84